"Today I am deeply concerned by the deteriorating situation in and around Debaltseve," Stoltenberg said. "The refusal of the separatists to respect the cease-fire threatens the agreement, as does their denial of access to the area for the OSCE monitors. Russian forces, artillery and air defence units as well as command and control elements are still active in Ukraine.
"I urge Russia to end its support for the separatists and withdraw its forces and military equipment from eastern Ukraine in accordance with the Minsk agreement.
"We continue to believe that this agreement is the best way forward to a political solution to the conflict in Ukraine," NATO Secretary General summed up.